Tool for removing connecting rods



Oct. 12, 1943. F. HENDRICKS 2,331,633

' TOOL.FOR REMOVING CONNECTING RODS I I Filed Dec. 15, 1941 2 Sheets-Sheet 1 INVENTOR.

Oct. 12, 1943. F. HENDRICKS 7 2,331,683

TOOL FOR REMOVING CONNECTING RODS Filed Dec. 15, 1941 2 Sheets-Sheet 2 IIIIII'III/lll/I M l m I INVENTOR. F/PAN/f fi F/VDW/C/f ATTORNEY Patented Get. 12, 1943 TOOL FOR REMOVING CONNECTING RODS Frank Hendricks, North Vernon, Ind., assignor of one-half to John H. Gilmer, North Vernon,

Ind.

Application December 15, 1941, Serial No. 423,099

1 Claim.

My invention relates to a special tool for use in removing connecting rods of engines from passenger cars and trucks, without draining the water or disturbing the head of the engine. I have illustrated the tool as being adapted for the Chevrolet cars and trucks.

Prior to my invention in replacing a connecting rod, it was necessary to draw the water from a the engine, remove the engine head, disconnect the ignition system, and then raise the piston through the top of the block or head, which operations are time consuming, and expensive, and are obviated by my invention.

My invention consists of a special tool which, after the pan is removed and the crank shaft turned, and the lower half of the crank case removed, may be readily introduced to remove the My improved special tool consists of the thrust bar I6 having a laterally and slightly upwardly projecting end ll provided with an opening 18, the main body of the bar having a bolt opening IS; the tool further consists of a screw threaded rod 29 on which is mounted a nut 2|, said rod having a head 22 provided with a kerf a.

To remove a connecting rod from an internal combustion engine, remove the pan 15. Then remove the lower half 8 of the crank shaft bearing, turn the crank shaft out of the way, as illustrated in Figu 2, thereby making it possible to allow the piston 2 to be moved down, as shown connecting rod wrist pin, the object of which is I to facilitate this operation, and make it unnecessary to remove the parts hereinbefore mentioned; and with this and other objectsin view my invention consists of the parts and combination of parts hereinafter pointed out.

In the drawings:

Figure 1 is a transverse vertical sectional view of an internal combustion engine with the pan at the lower end of the crank case removed in order to facilitate the removal of th -damaged connecting rod.

Figure 2 is a similar view showing the bolt normally clamping the wrist pin to the connecting rod replaced by a special tool.

Figure 3 is a view similar to Figure 2 showing my special tool operated to open the clamping jaws of the connecting rod to unlock them from the wrist pin.

Figure 4 is a horizontal section taken on the line 4-4 of Figure 2.

Figure 5 is a horizontal sectional view taken on the line 5-5 of Figure 2.

Figure 6 is a perspective view of the actuating rod and adjustment nut threaded thereon.

Figure '7 is a perspective view of the thrust plate designed to coact with the actuating rod.

The reference numeral l designates the cylinder head of an internal combustion engine, in which is mounted a piston 2, the cylinder head terminating at one end in a casing 3 having flanges 4 provided with bolt openings 5.

The lower end of the connecting rod 6 is provided with an enlarged base 1 having flanges 8, provided with bolt openings 9, said enlarged base having the usual bearing in in which the crank shaft II is sealed. This crank shaft bearing is completed by the lower half 12 which is secured to the base I by means of the bolts l 3 and 14 as showing inFigure 1. In this figure the pan I5 is shown detached.

in Figure 2; then remove the bolt 25 that clamps the wrist pin to the connecting rod.

With the parts in the engine and in the portions above set forth, the thrust bar It is now secured to the enlarged head of the connecting rod and secured in that position by the bolt l3,.

as clearly shown in Figures 2 and 3. The rod 20 is then inserted through the opening IS in the thrust bar and the nut 2| threaded on the rod; The rod is now pushed upward through an opening in the lower wrist pin clamping jaw 23, and then introduced into the threaded opening in the upper jaw 24. With the parts in this position the nut 2| is moved down on the threads of the rod 20 until it is sealed on the thrust bar 16. The nut 2| is then turned on the rod 20 by a suitable instrument thereby forcing it upward,

which movement moves the upper jaw 24 of the wrist pin clamp upward away from locking contact with said. pin, as clearly shown in Figure 3, whereby the wrist pin is free to be removed, leaving the connecting rod free to b pulled downward and removed. In placing a new connecting rod it is inserted in its p oper position, the nut 2| is moved upward on its rod, thereby leaving the jaw 24 free to clamp down on the already inserted wrist pin. The bolt 24 is then secured in position, as are also the lower half l2 of the crank bearing and the pan l5 in proper sequence.

What I claim is: I

A special tool for removing connecting rods from internal combustion engines, comprising a thrust bar one end of which is extended upwardly and provided with a bolt opening, a screw threaded rod extending through said bolt opening, a nut threaded on said rod, said thrust plate having a'bolt opening designed to register with a bolt opening ina connecting rod whereby the thrust plate may be firmly clamped to the connecting rod.

FRANK HENDRICKS. 

